This matchup revolves around disrupting the opponent's explosive mana engine before they can deploy Karn, the Great Creator or Emrakul, the Aeons Torn. Blood Moon is your best card here, converting Urza's Workshop, Urza's Tower, Urza's Mine, Urza's Power Plant, and Planar Nexus into basic Mountains and gutting their entire mana production scheme. Once Painter's Servant is in play naming blue, every Pyroblast and Red Elemental Blast in your hand becomes a hard counter for any spell the opponent casts, creating a near-lock on their development. Disruptor Flute naming Karn, the Great Creator prevents them from fetching Mycosynth Lattice from their sideboard (which would lock your mana entirely), while Pithing Needle on Candelabra of Tawnos or Karn's activated ability handles the remaining threat vectors. Prioritize resolving Blood Moon or Painter's Servant early — Trinisphere is their best hate piece against you, so use Lotus Petal and Ancient Tomb to play through it whenever possible.